Annealing-furnace.



J. E. WHITE.

ANNEALING FURNACE. APPLICATION FILED MAR. '18. 1915.

1,158,760. Patented Nov. 2, 1915.

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COLUMBIA PLANOGRAPH co.. WASHINGTON. D. c.

J. E. WHITE.

ANNEALING FURNACE.

APPLICATION FILED MAR. 18, m5.

' 1,158,760} Patented Nov. 2, 1915.

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"JOHN E. WHITE, or TARE'NTUM, IE'TEENNVSYLVQIXNIA, 'ASSIGNOR mo WEST "PENN STEEL COMPANY, or BRAQKENBIDGE, PENNsYLvieNm; 'A GORPORATIQN eswemw JERSEY.

fTziferitiim, in the ceurit y Aileghen y arid State {of Pennsylvania, have inverited eerna ling-Furnaces, of whichithe follewirigfis My invefition relzites "to drinezihrig flirna'ces; has for its 'ebjeet -to previde, in a; furnace (if this type, a c onsfifi tiemidept 'ed to embody "a cjenibu's tien chambe sin 11. II. of i .1, g. eieeerafisee eee t me viewyinaimd byth'e 111. 1111. dfiFig! 2. Fig. risasirniler'viewyiiidicdted Spe'eificati'o'n of Letters Pater 1t.

-ANNEALING-FURNACE.

Patented Nev. 2, 1915.

V iip lieati n filed March 18, 1"i5. V Srieil'ilo. 15,185.

'Whichinay be fire'd by hand erbya suitzible st'oker, {is desired;

Abovethe furnace Chamber 3,the roof 4 'exteiids ba ckwa-rdlyinarch f0rm,preferab1y straight for a short distance above the bridge will 5,2tndthei1s10pes blewnwardly by *the portion 6, termiiiitihg at the rear end efthe furnace, which is c'losed'by "any suitable door ceristruetion 7. Extending retirwardly from bridge Wall 5 isan inner opiiig Or roof 8, forming the eoveri'ngof the inner annealing box chamber 9, into Whiehthe aiineeling bo x is introduced and positioned, as indicated in dotted lines in Fig. 2, and referred to by humeral 10 in Fig. 3. V

'The zi nn'eziling bo'X, Whieh is of Wellkn'Oivn 'censtriietioh, e'zithds abbv'e siliid is siipp'drted, "with its contents, iip'bn a b tt'om :11 which rests by "detrim- 'Wzir'dly eXt'nding pedestals "6r efoss ridges 12, iipeh the siipporting flo'dr 13 of the 'fiirha'ce. Said floor is preferably provided With kingitudin'al retzingiilar hfoilbw supportin metallic bearings 14, embedded in the briek Work of the H061; and flush with the upper "s iirfeee thereof, "whereby t0 'preverit abrasion 153 the anriealifigbok bdtto'in.

"Ceiitrally of the furnace 'fleor is a ridge 01' *pier 'lfifo'nthe same general level with the floor, at each sideef which' are depressed *c'haln'iiels 16, 16, eiztending longitudinally upwardly throughput the length or the bottom. The

Object of these hamiels' 16 is two fbld. 'fFirs't to provide, "Clearance Openings and theirs 17, 17fup0h WhiC'hti'zWeIS a carriage for introducing the anneitlifrig boX intemid taking itOut of thefurntie but which is not provided with a series of downwardly directed ports 22, opening downwardly flush with the inner face of the main side walls 2, from the main gas circulating passage 23 sbetween main roof 6 and inner roof 8. This passage, as shown, owing to the sloping arrangement of the main roof 6, radually narrows in depth toward the rear end of; the furnace, termlnatlng in a narrowed arch- 10- like opening 241 immediately above the rear terminal of roof 8. By this arrangement, the gases in combustion are spread laterally into a comparatively thin film, and pass 'therethrough downwardly over the rear end of the annealing box,and outwardly through the rear ports 18 to ports 19 and fines 20,

as already described.

The ports 22 serve to convey the gases downwardly,along eaoh side of the annealbzoing box, said ports being preferably arranged to correspond in position with the ports 18, whereby the gas currents will pass directly downwardly and then underneath the annealing box bottom to the respective 2 5 outlet nortslS, and to the-stack in the same manner.

Each port 22 is provided with a controlling damper 25 operable horizontally across the port through a suitable slideway opening in the main wall, as clearly shown, whereby each port may be accurately controlled and either partially or entirely opened or closed, whereby to accurately regulate the degree of circulation therethrough.

85 133 this means, and with the controlling' dampers 21, it will be readily seenthat the circulation of the gases around theannealing box 10 may be very accurately regulated,

so as to distribute the heat thereto asv desired 40 to suit the conditions'of the work. The circulation of the gases is thereby well adapted for the highest efiiciency of their heating qualities, and any undue exposure or liabilitv to over or under heating is completely 46 avoided. The annealing chamber may thus be kept at a uniform or any desired temperature through its entire interior, thereby greatly contributing to the successful operation of the furnace.

50 The construction, operation and advantages of the invention will be readily understood and appreciated from the foregoing description. I

It will be understood that the construction, proportions, design or other details of the invention may be changed or varied by the skilledmechanic, but that all such are to r be considered as within the scope of the following claims. I

i I -What I claim is:

1. An annealing furnace having acombust1on chamber and a brldge wall, an outer mam roof, an mner roof extendmgfrom the bridge wall toward the opposite end of the i furnaceand between the side walls and pro- -openi ngs, i V v 3. An annealing furnace havinga com-85 o i bustion chamber and abridge wall, an outer main roof, an inner. roof extending from furnace and between the side walls and prorected outlet openings communicating with bridge wall providing affurnace chamber,

vid ed at each sidewith circulation ports, and a supporting bottom provided with a series of outlet openingsqcommunicating downwardly with van off-take channel and upwvardly through the bottomof the furnace interior. f1 7,, .7 or: V r

2. An annealing furnacehavinga combustion chamber and a bridge wall, an outer main roof sloping toward the opposite end, an inner horizontal roofextending from the bridge wall along underneath the main roof and terminating inwardly of the, end of the main roof providingra transverse 1 gas port between its terminal and the main roof and having at each side a series of downwardly directed gas circulation ports adjacent the side walls, and a "supporting;

bottom provided with a series .of outlet the bridge wall toward the opposite end-of the furnace and between the side walls'and provided at each side with circulation ports,

and a supporting bottom provided with longitudinal channels at each side'of a central,

rpierthaving inwardly and downwardly directed outlet openings, 7 V 4. An annealing furnace having a com bustion chamber and a bridge wall, an outer main roof, an inner roof extending from the, I

bridge wall toward theopposite end of the furnace and between the sidewalls and provided at each side with' circulation ports, and asupporting bottom provided with longitudinal channels at each side of a central pier having inwardly and downwardly directed outlet openings communicating with outlet ports leading to a stack,

5. An annealing furnace having a combustionehamber and a bridge wall, an outer, main roof, an inner'roof extending from the bridge wall toward the opposite end of the of an inner roof extendinglrearwardly from t I the bridge wall for a portion of the length of thefurnace terminating adjacent to the main roof and providing an intervening transverse gas port, and having agseries of. y

downwardly directing gas circulation ports at each side adjacent to saidjwall, andmeans V V I for ear yms. fi t ar a -w e 3. eeta t em W3 7 In an annealing furnace, the combination with the main side walls, roof and bridge wall providing a furnace chamber, and a supporting bottom having a plurality of outlet ports leading to a stack or the like, of an inner roof extending rearwardly from the bridge wall for a portion of the length of the furnace terminating adjacent to the main roof and providing an intervening transverse gas port and having a series of downwardly directing gas circulation ports at each side adjacent to said wall, each provided with a controlling damper, and means for carrying off the products of combustion.

8. In an annealing furnace, the combination with the main side walls and furnace chamber inclosed thereby, of a bridge wall, an inner roof extending horizontally therefrom between the side walls having downwardly extendin ports at each side and terminating inwardly beyond the other end of the furnace, an outer roof sloping from the furnace chamber portion and providing a narrow transverse gas port between it and the end of the inner roof, an endmost door,

and a floor structure provided with depressed channels and outlet ports leading therefrom to a stack or the like.

9. In an annealing furnace, the combination with the main side walls and furnace chamber inclosed thereby, of a bridge wall, an inner roof extending horizontally therefrom betweenthe side walls having downwardly extendin ports at each side and terminating inwardly beyond the other end of the furnace, an outer roof sloping from the furnace chamber portion and providing a narrow transverse gas port between it and the endof the inner roof, an endmost door, and a floor structure provided with depressed channels and outlet ports arranged in transverse alinement with said downwardly extending ports and leading from Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

